Net Income Planning Midvale Corporation sells a single product for $100 per unit, of which $40 is contribution margin. Fixed costs total $264,000 and net income before income tax is $48,000. Determine the following a. The present sales volume in dollars. $ b. The break-even point in units. units C. The sales volume in units necessary to attain a net income before income tax of $60,000 units d. The sales volume in units necessary to attain a net income before income tax equal to 10% of sales revenue. units e. The sales volume in units necessary to attain an after-tax net income of $54,000 if the tax rate is 40% units